Question

1. A particular tube for a pipe organ is 4m long and open at both ends. The speed of sound is about 340m/s.

   1. Draw the first three harmonics and find the frequencies for the pressure wave view of sound. For each frequency, find another tube length that could also have this frequency as a harmonic.

   2. Now pretend the tube is closed at one end. Draw the first two harmonics and find the frequencies.

Answer 1

Fat thor Hamons'c s 3 rd Hamonic L A 8 m frequeney 3 40 4-a SH 2 Ham omic 2nd axd2 L L 4- m 340 8SH2 4- Hamonic 3d 3 3 2 27 5 H2 340x 2 tube Rangthof amother find to Nous 340 o LI 42. S f, 42 S H2 * Nouw amy mteger torequin cies f u fats n s wherr will haua ther e for n 2 1.

for e ndclosed pipe Hamonic 2nd Hamonu'c first Hamonic 21.2SH2 T6 for Hamonic 2nd 3 A 4 - 3 21.2 Sx 3 340 3 9 S3.7S H2